IO多路复用之一

1.socketserver的执行流程

import socketserver

class MyClass(socketserver.BaseRequestHandler):

    def handle(self):
        pass

obj = socketserver.ThreadingTCPServer((‘127.0.0.1‘,9999),MyClass)
obj.serve_forever()

IO多路复用SERVER端：

__author__ = ‘alex‘
#coding:utf-8
import socket
import select

ip_port = (‘127.0.0.1‘,9999)
sk = socket.socket()
sk.bind(ip_port)
sk.listen(5)

inputs = [sk,]
outputs = []
while True:
    rlist,wlist,e = select.select(inputs,outputs,[],2)
    print (len(inputs),len(rlist),len(wlist),len(outputs))

    for r in rlist:
        if r == sk:
            conn,addr = r.accept()
            inputs.append(conn)
            conn.sendall(bytes(‘hello‘,‘utf8‘))
        else:
            try:
                ret = r.recv(1024)
                if not ret:
                    raise Exception("断开异常连接")
                else:
                    outputs.append(r)
            except Exception:
                inputs.remove(r)

    for w in wlist:
        w.sendall(bytes("response","utf8"))
        outputs.remove(w)

IO多路复用CLIENT端：

__author__ = ‘alex‘
import socket
import select
#coding:utf-8

ip_port = (‘127.0.0.1‘,9999)
sk = socket.socket()
sk.connect(ip_port)
data = sk.recv(1024)
print (str(data,‘utf8‘))
while True:
    inp = input(">>>>>>>>")
    sk.sendall(bytes(inp,encoding=‘utf8‘))
    print (sk.recv(1024))
sk.close()